1/*
2 *   Copyright (C) International Business Machines Corp., 2000-2004
3 *
4 *   This program is free software;  you can redistribute it and/or modify
5 *   it under the terms of the GNU General Public License as published by
6 *   the Free Software Foundation; either version 2 of the License, or
7 *   (at your option) any later version.
8 *
9 *   This program is distributed in the hope that it will be useful,
10 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
11 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
12 *   the GNU General Public License for more details.
13 *
14 *   You should have received a copy of the GNU General Public License
15 *   along with this program;  if not, write to the Free Software
16 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18#ifndef _H_JFS_TYPES
19#define	_H_JFS_TYPES
20
21/*
22 *	jfs_types.h:
23 *
24 * basic type/utility definitions
25 *
26 * note: this header file must be the 1st include file
27 * of JFS include list in all JFS .c file.
28 */
29
30#include <linux/types.h>
31#include <linux/nls.h>
32
33#include "endian24.h"
34
35/*
36 * transaction and lock id's
37 *
38 * Don't change these without carefully considering the impact on the
39 * size and alignment of all of the linelock variants
40 */
41typedef u16 tid_t;
42typedef u16 lid_t;
43
44/*
45 * Almost identical to Linux's timespec, but not quite
46 */
47struct timestruc_t {
48	__le32 tv_sec;
49	__le32 tv_nsec;
50};
51
52/*
53 *	handy
54 */
55
56#define LEFTMOSTONE	0x80000000
57#define	HIGHORDER	0x80000000u	/* high order bit on	*/
58#define	ONES		0xffffffffu	/* all bit on		*/
59
60/*
61 *	physical xd (pxd)
62 */
63typedef struct {
64	unsigned len:24;
65	unsigned addr1:8;
66	__le32 addr2;
67} pxd_t;
68
69/* xd_t field construction */
70
71#define	PXDlength(pxd, length32)	((pxd)->len = __cpu_to_le24(length32))
72#define	PXDaddress(pxd, address64)\
73{\
74	(pxd)->addr1 = ((s64)address64) >> 32;\
75	(pxd)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\
76}
77
78/* xd_t field extraction */
79#define	lengthPXD(pxd)	__le24_to_cpu((pxd)->len)
80#define	addressPXD(pxd)\
81	( ((s64)((pxd)->addr1)) << 32 | __le32_to_cpu((pxd)->addr2))
82
83#define MAXTREEHEIGHT 8
84/* pxd list */
85struct pxdlist {
86	s16 maxnpxd;
87	s16 npxd;
88	pxd_t pxd[MAXTREEHEIGHT];
89};
90
91
92/*
93 *	data extent descriptor (dxd)
94 */
95typedef struct {
96	unsigned flag:8;	/* 1: flags */
97	unsigned rsrvd:24;
98	__le32 size;		/* 4: size in byte */
99	unsigned len:24;	/* 3: length in unit of fsblksize */
100	unsigned addr1:8;	/* 1: address in unit of fsblksize */
101	__le32 addr2;		/* 4: address in unit of fsblksize */
102} dxd_t;			/* - 16 - */
103
104/* dxd_t flags */
105#define	DXD_INDEX	0x80	/* B+-tree index */
106#define	DXD_INLINE	0x40	/* in-line data extent */
107#define	DXD_EXTENT	0x20	/* out-of-line single extent */
108#define	DXD_FILE	0x10	/* out-of-line file (inode) */
109#define DXD_CORRUPT	0x08	/* Inconsistency detected */
110
111/* dxd_t field construction
112 *	Conveniently, the PXD macros work for DXD
113 */
114#define	DXDlength	PXDlength
115#define	DXDaddress	PXDaddress
116#define	lengthDXD	lengthPXD
117#define	addressDXD	addressPXD
118#define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32))
119#define sizeDXD(dxd)	le32_to_cpu((dxd)->size)
120
121/*
122 *	directory entry argument
123 */
124struct component_name {
125	int namlen;
126	wchar_t *name;
127};
128
129
130/*
131 *	DASD limit information - stored in directory inode
132 */
133struct dasd {
134	u8 thresh;		/* Alert Threshold (in percent)		*/
135	u8 delta;		/* Alert Threshold delta (in percent)	*/
136	u8 rsrvd1;
137	u8 limit_hi;		/* DASD limit (in logical blocks)	*/
138	__le32 limit_lo;	/* DASD limit (in logical blocks)	*/
139	u8 rsrvd2[3];
140	u8 used_hi;		/* DASD usage (in logical blocks)	*/
141	__le32 used_lo;		/* DASD usage (in logical blocks)	*/
142};
143
144#define DASDLIMIT(dasdp) \
145	(((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo))
146#define setDASDLIMIT(dasdp, limit)\
147{\
148	(dasdp)->limit_hi = ((u64)limit) >> 32;\
149	(dasdp)->limit_lo = __cpu_to_le32(limit);\
150}
151#define DASDUSED(dasdp) \
152	(((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo))
153#define setDASDUSED(dasdp, used)\
154{\
155	(dasdp)->used_hi = ((u64)used) >> 32;\
156	(dasdp)->used_lo = __cpu_to_le32(used);\
157}
158
159#endif				/* !_H_JFS_TYPES */
160